[
https://issues.apache.org/jira/browse/HBASE-7221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13509529#comment-13509529
]
Lars Hofhansl commented on HBASE-7221:
--------------------------------------
Interface looks good (so does this idea, generally).
But we are now (kind of) prescribing a way in which HBase should do its
encoding.
It seems this is best handled by an external library (orderly or lily do this).
Encoding numbers into correctly sorted byte[] is not entirely trivial, neither
is separating variable length parts of the key, different users will have
different needs. Are strings UTF8? what about special sorting for languages?
What about floats? They need to be encoded to sort correctly even considering
their exponents (again there're libraries out there doing this already).
At the same time everybody using HBase is building something like this, so
maybe HBase should ship with a reasonable set of default encodings.
> RowKey utility class for rowkey construction
> --------------------------------------------
>
> Key: HBASE-7221
> URL: https://issues.apache.org/jira/browse/HBASE-7221
> Project: HBase
> Issue Type: Improvement
> Reporter: Doug Meil
> Assignee: Doug Meil
> Priority: Minor
> Attachments: HBASE_7221.patch, hbase-common_hbase_7221_2.patch,
> hbase-common_hbase_7221_v3.patch
>
>
> A common question in the dist-lists is how to construct rowkeys, particularly
> composite keys. Put/Get/Scan specifies byte[] as the rowkey, but it's up to
> you to sensibly populate that byte-array, and that's where things tend to go
> off the rails.
> The intent of this RowKey utility class isn't meant to add functionality into
> Put/Get/Scan, but rather make it simpler for folks to construct said arrays.
> Example:
> {code}
> RowKey key = RowKey.create(RowKey.SIZEOF_MD5_HASH + RowKey.SIZEOF_LONG);
> key.addHash(a);
> key.add(b);
> byte bytes[] = key.getBytes();
> {code}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
